Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'

Question

why this error comes?

I am using windows authentication. But i am getting error

Login failed for user \'NT AUTHORITY\\ANONYMOUS LOGON\'

can any one help

Answer 1

First of all, I always prefer to use the 'impersonation' settings in the ISS configuration that do not set the user/password in the web.config. Everything was fine in the QA environment, but then I passed to the production environment and some options of the web site in production started to show the 'Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON' error.

The issue was that I copied the web-site configuration from the QA server, using the 'Save configuration to a file' option in IIS6 while creating a brand new Application Pool in the production server.

After several hours trying to solve this error, I just deleted the Application Pool, and used the 'Save configuration to a file' option to copy the Application Pool configuration and then restored it to the new server.

If you copy the web-site configuration, also copy the Application Pool configuration. That solved my problem, without changing anything about the authentication method, the database or the web-site itself.